JP4817466B2 - Flat conductor electrical connector - Google Patents

Description

  The present invention relates to an electrical connector for a flat conductor.

  An electrical connector disclosed in Patent Document 1 is known as an electrical connector for a flat conductor. In Patent Document 1, a housing for receiving a flat conductor (flat cable) such as FPC and FFC, and a metal plate are formed by punching a metal plate into a substantially H shape and maintaining a flat plate surface. Has a terminal group having a plurality of first terminals and a plurality of second terminals that are press-fitted and held in the housing, and an actuator rotatably attached to the housing. The actuator has an open position that allows insertion of the flat conductor into the housing and a closed position that maintains the contact portion (contact portion) of the terminal in contact with the inserted flat conductor with contact pressure. The actuator can be rotated around the shaft portion of the actuator.

  One of the first terminal and the second terminal, for example, the second terminal includes an upper arm portion and a lower arm portion extending in the flat conductor insertion direction, and a connecting portion that connects the upper arm portion and the lower arm portion. Have. The upper arm part and the lower arm part are connected to the upper arm part and the lower arm part connected to the connecting part. The lower arm portion has a cable support portion for supporting the inserted flat conductor from below at one end side in the insertion direction, and a connection portion (tail portion) soldered to the circuit board on the other end side. Yes. Further, a contact portion that contacts the flat conductor is formed on one end side of the upper arm portion, and an operating lever portion that restricts the upward movement of the shaft portion of the actuator is formed on the other end side.

  In the second terminal, when the actuator is rotated from the open position to the closed position with the flat conductor inserted into the housing, the operating lever portion is pushed up by the shaft portion of the actuator having an elliptical cross section, and connected. The part is elastically deformed, and the entire upper arm part rotates on the lever. As a result, the contact portion of the upper arm portion moves downward and comes into contact with the conductive wire provided on the upper surface of the flat conductor with contact pressure. The first terminal also basically has the same configuration as the second terminal except that the connecting portion is provided not at the other end but at one end, that is, at the end on the cable support side.

  The housing includes a slit-shaped first terminal holding recess and a second terminal holding recess (hereinafter referred to as “terminal group”) that hold the first terminal and the second terminal (hereinafter collectively referred to as “terminal group”) on the plate surface of the terminal. , Generically referred to as “terminal holding recess”). For example, the second terminal holding recess for holding the second terminal includes an area closer to the contact portion than the connecting portion in the upper arm portion of the second terminal, an area closer to the cable support portion than the connecting portion in the lower arm portion, and the connecting portion. A narrow portion is formed corresponding to each of the regions. The groove width (width in the terminal plate thickness direction) dimension of the narrow portion approximates the plate thickness dimension of the terminal, and the size of the gap between the inner surface of the narrow portion and the outer surface of the terminal is zero or extremely minute It has become. The narrow portion regulates the displacement of the second terminal in the plate thickness direction, and the second terminal is brought to the normal position in the same direction.

  In addition, the other region that extends from the portion adjacent to the connecting portion to the connected region of the upper arm through the connecting portion is formed as a wide portion or a cutout portion. The width of the wide portion is sufficiently larger than the thickness of the terminal, and a gap larger than that of the narrow portion is formed in the wide portion. That is, a predetermined gap is secured between the plate surface of the second terminal and the inner wall surface of the wide portion facing the second terminal. Moreover, the notch part has penetrated the both-sides wall part of the 2nd terminal holding recessed part, and the space is formed with respect to the terminal also in this notch part.

  Therefore, when the connecting portion of the lower arm is soldered to the circuit board, the melted flux may rise in the narrow portion along the plate surface of the connecting portion located in the narrow portion due to capillary action. In the wide portion adjacent to the narrow portion, there is a sufficient gap between the inner wall surface of the wide portion and the plate surface of the terminal so that capillary action does not occur. Therefore, the flux does not move in the wide portion. , Further entry of the flux is prevented. In the electrical connector described in Patent Document 1, in this way, flux entry, that is, so-called flux rise, is prevented, so that the flux can be prevented from reaching the region of the upper arm portion through the connecting portion. The rotation of the part is secured. The first terminal holding recess for holding the first terminal has basically the same configuration as the second terminal holding recess.

JP2007-287398

  Since the flux rise may adversely affect the terminals as described later, it is preferably not caused at all. Therefore, from the viewpoint of preventing flux rise, the terminal holding recess is formed with a wide portion also in the region of the connection portion that is a solder connection portion with the circuit board, and a gap is provided around the connection portion. It is desirable to keep it. However, when the wide portion corresponding to the region of the connecting portion is formed, from the viewpoint of the holding position accuracy of the terminal in the plate thickness direction, in the region on the contact portion side and the lower arm portion in the upper arm portion. Since it is restricted only by the two narrow portions corresponding respectively to the region on the cable support portion side with respect to the connecting portion, misalignment in the plate thickness direction is likely to occur. Therefore, the terminal posture in the plate thickness direction tends to become unstable in the wide portion.

  For example, when the terminal is press-fitted into the terminal holding recess in a position slightly displaced in the plate surface direction when the terminal is press-fitted, or when the terminal is deformed such as warping, the above-mentioned deviation is caused in the wide part having a large width dimension. The posture and deformation are allowed and the posture remains as it is. As a result, for example, the entire terminal portion in the wide portion is inclined or deformed in the plate thickness direction (hereinafter referred to as “runout”), and the upper arm portion and the lower arm portion are twisted in opposite directions in the plate thickness direction. Deformation (hereinafter referred to as “twist”) may occur.

  When the terminal is displaced in the plate thickness direction in the wide portion as described above, one plate surface of the terminal can contact the inner wall surface of the wide portion. Therefore, even if the wide portion is formed corresponding to the region of the connection portion, when the above-described deflection or twist occurs, the flux generated by the solder connection of the connection portion is not in the wide portion. It moves along the plate surface of the terminal that has come into contact with the inner wall surface. The flux moving in the wide part in this way finally reaches the upper arm part via the connecting part. As a result, the upper arm portion is in a state of being bonded to the inner wall surface of the terminal holding recess through the flux, and the mobility of the upper arm portion may be significantly impaired. Further, when the flux reaches the contact portion of the upper arm portion, there is a risk of causing an electrical contact failure between the contact portion and the cable.

  In view of such circumstances, the present invention effectively suppresses flux increase by effectively regulating the displacement of the terminal in the plate thickness direction while forming the wide portion corresponding to the region of the connection portion. An object is to provide an electrical connector for a flat conductor.

  An electrical connector for a flat conductor according to the present invention includes a housing made of an electrical insulator, and a terminal press-fitted and connected to the flat conductor by a terminal holding groove formed in a slit shape in the housing, The terminal is made by maintaining the flat surface of the metal plate, and connects the upper and lower arm portions arranged side by side, and the upper arm portion and the lower arm portion, which are connected to each other by the connected region of both arm portions. The lower arm portion is held by the terminal holding groove and has a connection portion that is solder-connected to the circuit board, and the upper arm portion is a pressing portion that presses the upper surface of the flat conductor downward. On one end side which is the insertion side of the flat conductor.

  In such a flat conductor electrical connector, the terminal holding groove is larger than the plate thickness of the terminal corresponding to the first region including the connecting portion, the connected region of the upper arm portion, and the portion provided with the connecting portion. A first groove region having an in-groove width dimension is formed, formed outside the first region of the terminal, at least two locations for one of the upper arm portion and the lower arm portion, and at least one location for the other Corresponding to the second region to be formed, a second groove region that allows insertion of the second region is formed with a groove inner width dimension smaller than that of the first groove region.

  In the present invention, the second groove region is formed corresponding to the second region formed in at least two locations for one of the upper arm portion and the lower arm portion and at least one location for the other. In other words, since the displacement of the terminal in the plate thickness direction is restricted at least at three locations, even if the first groove region corresponding to the portion where the connection portion is provided is wide to prevent the flux from rising, the plate thickness The position of the terminal in the direction is stably maintained at the normal position. As a result, the terminal is less likely to be shaken or twisted, and a gap having a normal width is secured between the plate surface of the first region and the inner wall surface of the first groove region. Therefore, capillary action does not occur in the gap, and flux rise in the first region is prevented.

  Further, in the present invention, as described above, the first groove region having a groove inner width larger than the plate thickness of the terminal is formed corresponding to the first region including the portion provided with the connection portion. A predetermined gap is secured between the connection portion and the first groove region. Therefore, even if the connecting portion is soldered to the circuit board, the flux does not move up along the connecting portion. As a result, flux increase is fundamentally prevented.

  The second region is preferably formed at a position outside the first region and adjacent to at least one of the connected region of the upper arm and the connected region of the lower arm. The connected area of the upper arm part is included in the first area, and the connected area of the lower arm part is connected to the lower part of the connecting part included in the first area. Accordingly, the second region is formed at a position adjacent to at least one of the connected region of the upper arm portion and the connected region of the lower arm portion, so that the shift in the thickness direction of the first region is changed to the first region. It will be regulated at a close position. Since the displacement restriction position is closer to the first region, the effect of the displacement restriction can be increased, and the terminal can be reliably maintained at the normal position.

  The second region may be formed as a protrusion protruding from at least one edge of the upper arm and the lower arm.

  The electrical connector for a flat conductor according to the present invention includes a pressure member that is rotatable between an open position that allows insertion of the flat conductor and a closed position that increases contact pressure at the pressing portion with respect to the flat conductor. The pressurizing member further includes a cam portion that is arranged between the upper arm portion and the lower arm portion and that acts on the upper arm portion in the closed position to press the pressing portion against the flat conductor. Can be.

  The upper arm part and the lower arm part are connected to each other in the longitudinally intermediate part by a connecting part, and the upper arm part applies a force from the cam part to the other end side of the connected part of the upper arm part. The lower arm portion has a flexible branch arm that branches upward on one end side from the coupled region of the lower arm portion and extends to the one end side. The arm has a contact portion in contact with the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the other end side with respect to the coupled region of the lower arm portion and the connection portion. It can be made to have a cam guide part which guides rotation of a cam part between this connected area.

  The upper arm part and the lower arm part are connected to each other in the longitudinally intermediate part by a connecting part, and the upper arm part applies a force from the cam part to the other end side of the connected part of the upper arm part. The lower arm portion has a flexible branch arm that branches upward on one end side from the coupled region of the lower arm portion and extends to the one end side. The branch arm has a contact portion that comes into contact with the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the one end side, and has the other end than the coupled region of the lower arm portion. You may have the cam guide part which guides rotation of a cam part in the side.

  The terminal is composed of two types of terminals, a first terminal and a second terminal. The first terminal and the second terminal are alternately arranged, and the first terminal has an upper arm portion and a lower arm portion in the middle in the longitudinal direction. Are connected to each other by a connecting portion, and the upper arm portion has a pressure receiving portion that receives a force from the cam portion on the other end side of the upper arm portion to be connected, and the lower arm portion has the It has a flexible branch arm that is branched upward on one end side from the connected region of the lower arm portion and extends to the one end side, and the branch arm contacts the lower surface of the flat conductor on the one end side. A contact portion, and the lower arm portion has a connecting portion on the other end side of the connected region of the lower arm portion, and guides rotation of the cam portion between the connecting portion and the connected region. The second terminal has an upper arm portion and a lower arm portion that are connected to each other by a connecting portion at the intermediate portion in the longitudinal direction, and the upper arm portion is connected to the upper terminal. A pressure-receiving portion that receives the force from the cam portion on the other end side of the connected region of the lower arm portion, and the lower arm portion is branched upward on one end side from the connected region of the lower arm portion. It has a flexible branch arm that extends to one end, the branch arm has a contact portion that contacts the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the one end side. And you may have the cam guide part which guides rotation of a cam part to the other end side rather than the to-be-connected area | region of this lower arm part.

  As described above, in the present invention, since the second groove region corresponding to the second region formed at least at three locations outside the first region is formed, the above three locations located in a wide range of the plate surface of the terminal Thus, by restricting the shift in the thickness direction of the second region by the second groove region, the first region is reliably maintained at the normal position in the first groove region. Therefore, a gap with a normal width is formed between the plate surface of the first region and the inner wall surface of the first groove region, so that flux rise can be prevented well, and as a result, the mobility of the upper arm portion of the terminal is ensured. it can. In addition, it is possible to avoid deterioration of the state of the terminal surface due to flux increase. Furthermore, by forming a first groove area having a groove inner width larger than the plate thickness of the terminal corresponding to the first area including the portion provided with the connecting portion, the plate surface of the first area and the first groove are formed. Since a gap is formed between the inner wall surface of the region, it is possible to fundamentally prevent an increase in flux when the connection portion is soldered to the circuit board.

It is a section perspective view in the field parallel to the board surface of a terminal showing the connector and flat conductor concerning this embodiment, and shows the section in the position of the 1st terminal. It is a section perspective view in the field parallel to the plate surface of a terminal showing the connector and flat conductor concerning this embodiment, and shows the section in the position of the 2nd terminal. It is sectional drawing in a surface parallel to the plate | board surface of the terminal of the connector shown by FIG. 1 (A), (B), (A) is a cross section in the position of a 1st terminal, (B) is a 2nd terminal. A cross-section at the position is shown. It is sectional drawing which shows the terminal holding groove of the housing in FIG. 2 (A), (B), (A) shows a 1st holding groove and (B) shows a 2nd holding groove. It is explanatory drawing which compared the width dimension in a groove | channel of a 1st groove area and a 2nd groove area with the board thickness dimension of a terminal.

  Hereinafter, embodiments of an electrical connector for a flat conductor according to the present invention will be described with reference to the accompanying drawings.

FIG. 1A shows a flat conductor electrical connector (hereinafter simply referred to as “connector”) according to the present embodiment and a flat conductor connected to the connector, on a plane perpendicular to the terminal arrangement direction. It is a section perspective view and shows the section in the position of the 1st terminal mentioned below. FIG. 1B is a cross-sectional perspective view of the connector and a flat conductor connected to the connector, taken along a plane perpendicular to the terminal arrangement direction, and a cross-section at the position of the second terminal described later. Is shown. Hereinafter, for convenience of explanation, the first terminal and the second terminal are collectively referred to simply as “terminal”.

  The connector 1 according to the present embodiment includes a synthetic resin housing 10 having a substantially rectangular parallelepiped outer shape, a plurality of metal terminals 20 and 30 arranged and held by the housing 10 in the longitudinal direction of the housing 10, A pressure member 40 made of a synthetic resin is rotatably attached to the housing 10.

  The terminals 20 and 30 are made by punching while maintaining a flat surface of a metal plate, and are composed of two types of terminals, a first terminal 20 and a second terminal 30 having different shapes. As often seen in FIGS. 1A and 1B, the first terminal 20 and the second terminal 30 are arranged in a posture in which the plate surfaces are parallel to each other with the longitudinal direction of the housing as the arrangement direction. They are arranged alternately.

  1A and 1B, the flat conductor P inserted into the housing 10 in the direction of arrow A is a flexible printed circuit board (FPC), and a reinforcing plate P1 is provided on the upper surface of the front side portion in the insertion direction. It is stuck. Further, the flat conductor P has a corresponding circuit portion P2 on the lower surface extending in the insertion direction of the flat conductor P corresponding to the terminals 20 and 30.

  2A is a cross-sectional view taken along a plane parallel to the plate surface of the terminal of the connector 1 shown in FIG. 1A, and shows a cross section at the position of the first terminal 20. FIG. 2B is a cross-sectional view taken along a plane parallel to the plate surface of the terminal of the connector 1 shown in FIG. 1B, and shows a cross section at the position of the second terminal 30. 2A and 2B, the pressure member 40 is not shown for convenience of explanation.

  2A and 2B, the housing 10 receives a flat conductor P as a recess that opens to the left on the side surface extending in the longitudinal direction, that is, the terminal arrangement direction (direction perpendicular to the paper surface). It has a receiving part 11. The receiving portion 11 is formed as a space that extends to an intermediate position in the insertion / extraction direction (left-right direction) of the flat conductor P and communicates in the terminal arrangement range in the terminal arrangement direction.

  The housing 10 is formed with slit-like terminal holding grooves extending in a direction perpendicular to the terminal arrangement direction (a direction parallel to the paper surface) and penetrating in the left-right direction at equal intervals in the terminal arrangement direction. . As shown in FIGS. 2A and 2B, the terminal holding groove is a first holding groove 13 that holds a first terminal 20 described later and a second holding that holds a second terminal 30 described later. It consists of a groove 14. The first holding grooves 13 and the second holding grooves 14 are alternately formed in the terminal arrangement direction of the housing 10 as is often seen in FIGS. Details of the shapes of the first holding groove 13 and the second holding groove 14 will be described later. Hereinafter, for convenience of explanation, the first holding groove 13 and the second holding groove 14 are collectively referred to as “terminal holding grooves 13, 14”.

  As is often seen in FIGS. 2A and 2B, the terminal holding grooves 13 and 14 are formed such that the upper half communicates with the terminal arrangement direction at the right side portion of the housing 10 and opens upward. A pressure member rotation space 12 is formed. In other words, the terminal holding grooves 13, 14 are a portion along the inner surface of the upper wall 15 located in the left half (hereinafter referred to as “upper groove portion”) and a portion along the inner surface of the bottom wall 16 (hereinafter referred to as “ And a portion (hereinafter referred to as “connecting groove”) that extends in the vertical direction at the middle position in the left-right direction and connects them.

  2A and 2B, the right side of the upper wall 15 of the housing 10 has the terminal holding grooves 13, 14 at the positions of the terminal holding grooves 13, 14 in the terminal arrangement direction. Grooves 13A and 14A forming a part of 14 are formed, and the edge of the upper wall 15 has a comb-teeth shape as is often seen in FIGS. The groove portions 13A and 14A communicate with the pressure member rotation space 12. The width dimension of the terminal holding grooves 13 and 14 (groove dimension in the terminal thickness direction of the terminal) will be described later.

  In the terminal holding groove 13, a standing wall 17 extending upward from the left end of the bottom wall 16 is formed, and an inner surface extending in the vertical direction of the standing wall 17, as will be described later, a fixing portion 22 </ b> B− of the first terminal 20. A fixed groove 17A is formed in which 1 is press-fitted at the plate thickness surface of the edge. Further, in the terminal holding groove 14, a standing wall 18 extending upward from the right end of the bottom wall 16 is formed, and an inner surface extending in the vertical direction of the standing wall 18 is fixed to the second terminal 30 as described later. A fixed groove 18A into which 32E is press-fitted is formed.

  As shown in FIG. 2A, the first terminal 20 is press-fitted and held in the first holding groove 13 of the housing 10 at a part of the plate thickness surface of the edge portion. The first terminal 20 has a substantially horizontal H shape in which an upper arm portion 21 and a lower arm portion 22 that extend in the left-right direction and are arranged side by side are connected by a connecting portion 23 that extends in the vertical direction at an intermediate position in the longitudinal direction. ing.

  The upper arm portion 21 has a pressing arm portion 21 </ b> B that extends toward the left from a connected region 21 </ b> A that is a region connected to the connecting portion 23. At the left end of the pressing arm portion 21B, a pressing portion 21B-1 protruding downward into the receiving portion 11 is formed. As will be described later, the pressing portion 21B-1 is displaced downward by tilting the upper arm portion 21 in a lever-like manner with the connected region 21A as a fulcrum based on the rotation of the cam portion 43 of the pressing member 40. The upper surface of the flat conductor P (not shown) inserted into the body 11 is pressed downward.

  The upper arm portion 21 has a pressure-receiving portion 21 </ b> C that extends rightward from the connected region 21 </ b> A into the movable member rotation space 12 and receives a force from a cam portion 43 of a pressure member 40 described later. . As will be described later, the pressed portion 21C is located near the right end of the lower edge thereof, and a pressed recess 21C-1 that is depressed corresponding to the cam portion is formed as a portion that can come into contact with the cam portion. Yes.

  The upper arm portion 21 has a protrusion 21D that protrudes upward from the connected region 21A. The protrusion 21D enters the groove 13A so as not to protrude outward from the upper surface of the upper wall 15.

  The lower arm portion 22 has a held arm portion 22B that extends toward the left from a connected region 22A that is a region connected to the connecting portion 23. At the left end of the held arm portion 22B, a fixing portion 22B-1 having an edge portion where the first terminal 20 is held by the fixing groove portion 17A of the standing wall 17 protrudes upward. The fixing portion 22B-1 is located on the left side of the pressing portion 21B-1 of the upper arm portion 21.

  A flexible contact arm portion 22C branched upward from the upper edge portion of the held arm portion 22B extends to the left at a position near the coupled area 22A of the held arm portion 22B. . The contact arm portion 22C extends to a position corresponding to the left end of the pressing arm portion 21B of the upper arm portion 21 in the left-right direction. At the left end of the contact arm portion 22C, a contact portion 22C-1 protruding upward into the receiving portion 11 is formed. The contact portion 22C-1 is formed at the same position in the left-right direction as the pressing portion 21B-1 of the pressing arm portion 21B, and the pressing portion 21B-1 and the contact portion 22C-1 approach each other in the up-down direction. Protruding.

The lower arm portion 22 also extends rightward from the coupled region 22A, and has a connecting portion 22D that is solder-connected to a circuit board (not shown) at the right end. The right end portion of the connection portion 22D protrudes out of the housing 10. The lower end 22D of the connecting portion 22D when the lower end 22D-1 of the connecting portion 22D is located below a little than the lower surface of the bottom wall 16 of the housing 10, the connector 1 is disposed on a circuit board - 1 contacts the corresponding circuit portion of the circuit board. The connecting portion 22D has a fixed recess 22D-2 that is fitted to the right end portion of the bottom wall 16 with a plate thickness surface of the edge portion.

  A cam guide portion 22E that guides the rotation of the cam portion 43 of the pressurizing member 40 described later is formed between the coupled region 22A of the lower arm portion 22 and the connection portion 22D. The cam guide portion 22E is located below the pressure-receiving portion 21C of the upper arm portion 21, and rotatably supports the cam portion 43 at the same position as the pressure-receiving recess 21C-1 of the pressure-receiving portion 21C in the left-right direction. A guide recess 22E-1 is formed.

  The connecting portion 23 is formed with a narrower arm width than the upper arm portion 21 and the lower arm portion 22 and can be elastically deformed so as to be inclined.

  When the first terminal 20 is attached to the housing 10, as shown in FIG. 2A, the first terminal 20 is press-fitted into the first holding groove 13 from the right side. In the first holding groove 13, the fixing portion 22B-1 of the held arm portion 22B of the first terminal 20 is press-fitted into the fixing groove portion 17A, and the fixing concave portion 22D-2 of the connection portion 22D is a bottom wall. 16 is fitted to the right end of the first holding groove 13 with the plate thickness of the edge of the fixed portion 22B-1 and the plate thickness of the edge of the fixed recess 22D-2. Retained.

  As shown in FIG. 2B, the second terminal 30 is press-fitted and held in the second holding groove 14 of the housing 10 at a part of the plate thickness surface of the edge portion. The second terminal 30 has a substantially horizontal H shape in which an upper arm portion 31 and a lower arm portion 32 that extend in the left-right direction and are arranged side by side are connected by a connecting portion 33 that extends in the vertical direction at an intermediate position in the longitudinal direction. ing. The connecting portion 33 is located at the same position as the connecting portion 23 of the first terminal 20 in the left-right direction.

  The upper arm portion 31 includes a pressing arm portion 31 </ b> B that extends toward the left from a connected region 31 </ b> A that is a region connected to the connecting portion 33. The pressing arm portion 31 </ b> B is shorter than the pressing arm portion 21 </ b> B of the first terminal 20. At a position near the left end of the pressing arm portion 31B, a pressing portion 31B-1 protruding downward into the receiving portion 11 is formed. As will be described later, the pressing portion 31B-1 is displaced downward by tilting the upper arm portion 31 in a lever-like manner with the connected region 31A as a fulcrum based on the rotation of the cam portion 43 of the pressure member 40. The upper surface of the flat conductor P (not shown) inserted into the body 11 is pressed downward.

  The upper arm portion 31 includes a pressure-receiving portion 31 </ b> C that extends rightward from the connected region 31 </ b> A into the pressure member rotation space 12 and receives a force from a cam portion 43 of the pressure member 40 described later. Yes. As will be described later, the pressed portion 31C can come into contact with the cam portion at a position near the right end of the lower edge portion thereof.

  The lower arm portion 32 extends leftward from a connected region 32A, which is a region connected to the connecting portion 33, and a connecting portion 32B that is solder-connected to a circuit board (not shown) at the left end. have. The left end portion of the connection portion 32B protrudes out of the housing 10. Further, the lower end 32B-1 of the connection portion 32B is located slightly below the lower surface of the bottom wall 16 of the housing 10, and the lower end 32B- of the connection portion 32B when the connector 1 is disposed on the circuit board. 1 contacts the corresponding circuit portion of the circuit board. The connection portion 32B has a fixed recess 32B-2 that is fitted to the left end portion of the bottom wall 16.

  An extending part 32C extending in the left-right direction is formed between the connected area 32A of the lower arm part 32 and the connecting part 32B. A flexible contact arm portion 32D branched upward from the upper edge portion of the extending portion 32C extends toward the left at a position near the coupled region 32A of the extending portion 32C. The contact arm portion 32D extends to the same position as the pressing portion 31B-1 of the upper arm portion 31 in the left-right direction. At the left end of the contact arm portion 32D, a contact portion 32D-1 protruding upward into the receiving portion 11 is formed. That is, the contact portion 32D-1 is formed at the same position in the left-right direction as the pressing portion 31B-1, and the pressing portion 31B-1 and the contact portion 32D-1 protrude so as to approach each other in the vertical direction. Yes.

  As is clear when FIG. 2A is compared with FIG. 2B, the pressing portion 31B-1 of the second terminal 30 is more rightward than the pressing portion 21B-1 of the first terminal 20 in the left-right direction. The contact portion 32D-1 of the second terminal 30 is also located to the right of the contact portion 22C-1 of the first terminal 20. As described above, the connector 1 according to this embodiment is configured such that the terminals come into contact with the inserted flat conductor at two different positions in the left-right direction. Therefore, for the flat conductor P, the contact positions of the terminals 20 and 30 are distributed in a staggered manner, and the contact state is stabilized as a whole.

  The lower arm portion 32 also extends to the right from the coupled region 32A, and a fixing portion 32E in which the second terminal 30 is held at the right end by the fixing groove portion 18A of the standing wall 18 at the plate thickness surface of the edge portion. Is formed. The fixing portion 32E has a fixing protrusion 32E-1 protruding upward.

  A cam guide portion 32F that guides the rotation of the cam portion 43 of the pressure member 40 is formed in a convex shape between the coupled region 32A of the lower arm portion 32 and the fixed portion 32E. The cam guide portion 32F is positioned below the pressure-receiving portion 31C of the upper arm portion 31, and the upper edge portion extends horizontally in the left-right direction.

  The connecting portion 33 is formed with a narrower arm width than the upper arm portion 31 and the lower arm portion 32, and can be elastically deformed so as to be inclined.

  When the second terminal 30 is attached to the housing 10, it is press-fitted into the second holding groove 14 from the left as shown in FIG. In the second holding groove 14, the fixing portion 32E of the second terminal 30 is press-fitted into the fixing groove portion 18A, and the fixing concave portion 32B-2 of the connection portion 32B is fitted to the left end portion of the bottom wall 16. Thus, the second terminal 30 is held in the second holding groove 14 by the plate thickness surface of the edge portion of the fixed protrusion 32E-1 and the plate thickness surface of the edge portion of the fixed recess 32B-2.

  FIG. 3A is a view showing the first holding groove 13 of the housing 10 in FIG. In FIG. 3A, the first terminal 20 is indicated by a two-dot chain line in order to facilitate understanding of the corresponding positional relationship with the first holding groove 13. The first holding groove 13 is formed with a plurality of regions (hereinafter referred to as “groove regions”) having different dimensions in the terminal arrangement direction (a direction perpendicular to the paper surface), that is, in-groove width dimensions. In FIG. 3 (A), each groove area is distinguished by applying a diagonal line.

  The first terminal 20 is formed by a portion obtained by removing the upper half portion of the left half portion of the pressing arm portion 21B, the protruding portion 21D, the pressed portion 21C, and the held arm portion 22B from the entire area of the first terminal 20. It has a first area.

  The first holding groove 13 for holding the first terminal 20 having the first region includes the lower half portion in the left half portion of the lower groove portion, the upper half portion in the left half portion of the upper groove portion, and the groove portion 13A. A portion removed from the entire area of the holding groove 13 is formed as a first groove area A corresponding to the first area.

  The first groove area A is composed of three partial areas having different groove width dimensions. Specifically, the first groove area A includes a partial groove area A1 corresponding to a portion where the connection part 22D of the first terminal 20 is provided, and a connected area 22A and a connection part 23 from the left end of the contact arm part 22C. The groove width is gradually narrowed from the partial groove area A1 toward the partial groove area A2 and the substantially horizontal U-shaped partial groove area A2 corresponding to the portion reaching the left end of the pressing arm portion 21B via the connected area 21A. It consists of a tapered partial groove area A3. That is, the partial groove area A1 has a larger width in the groove than the partial groove area A2 (see FIG. 4).

  FIG. 4 shows the partial groove areas A1, A2 of the first groove area A, the second groove area B described later, the partial groove areas A′1, A′2 of the first groove area A ′, and the second groove area B ′. It is explanatory drawing which compared the width dimension in a groove | channel with the plate | board thickness dimension of the terminals 20 and 30. FIG. In the figure, S indicates the thickness of the terminals 20 and 30. The partial groove areas A <b> 1 and A <b> 2 are formed with a groove width dimension larger than the plate thickness of the first terminal 20. In a state where the first terminal 20 is held in the first holding groove 13, a gap is formed between the inner wall surface of the partial groove areas A 1, A 2, A 3 and the plate surface of the first area of the first terminal 20. Has been.

  The first terminal 20 faces the upper half of the left half of the pressing arm portion 21B, the arm portion to be held 22B, and the protruding portion 21D, that is, outside the first region and facing the inner wall surface of the first holding groove 13. And a second region formed by the portion.

  The first holding groove 13 includes a lower half portion in the left half portion of the lower groove portion, an upper half portion in the left half portion of the upper groove portion, and a groove portion 13A as the second groove region B corresponding to the second region. Is formed.

  The second groove area B is formed with a groove width dimension smaller than that of the first groove area A. In the present embodiment, the in-groove width dimension of the second groove area B is slightly larger than the plate thickness of the first terminal 20, and the inner wall surface of the second groove area B and the plate surface of the first terminal 20 A slight gap is formed between the two. The second groove region B guides the second region B when the first terminal 20 is press-fitted into the first holding groove 13 with a part of the plate thickness surface of the edge portion, and the first terminal 20 plate It plays a role in regulating deviation in the thickness direction.

  In the present embodiment, as described above, in the upper arm portion 21, the upper half portion and the protruding portion 21D in the left half portion of the pressing arm portion 21B are formed as the second region. Further, in the lower arm portion 22, a held arm portion 22B is formed as a second region. Therefore, in the 1st terminal 20, in the board thickness direction by the 2nd groove area B corresponding to each 2nd area | region in the 2nd area | region of a total of three places of two places in the upper arm part 21, and one place in the lower arm part 22. FIG. Deviation is regulated.

  In the present embodiment, the in-groove width dimension of the second groove area B is slightly larger than the plate thickness dimension of the first terminal 20, but instead, for example, the in-groove width dimension of the second groove area B is The plate thickness dimension of the first terminal 20 may be substantially equal, and the second region of the first terminal 20 may be press-fitted into the second groove region B.

  FIG. 3B is a view showing the second holding groove 14 of the housing 10 in FIG. In the figure, the second terminal 30 is indicated by a two-dot chain line in order to facilitate understanding of the corresponding positional relationship with the second holding groove 14. Similarly to the first holding groove 13, the second holding groove 14 is also formed of a plurality of regions (hereinafter referred to as “groove regions”) having different dimensions in the terminal arrangement direction, that is, in-groove width dimensions. In FIG. 3B as well, each groove region is distinguished by hatching, as in FIG.

  The second terminal 30 is connected to the connecting portion 32B from the portion formed by the contact arm portion 32D, the connecting portion 33, the connected region 31A of the upper arm portion 31 and the pressing arm portion 31B, and the portion closer to the left of the extending portion 32C. It has a first region that is formed by every part.

  The second holding groove 14 for holding the second terminal 30 having the first region is a portion obtained by removing the lower half portion of the lower side groove portion from the left half portion of the lower groove portion, the left side of the connecting groove portion. The half part and the lower half part of the upper groove part are formed as a first groove area A ′ corresponding to the first area.

  The first groove area A 'is composed of three partial areas having different groove width dimensions. Specifically, the first groove area A ′ includes a partial groove area A′1 corresponding to a portion where the connection part 32B of the second terminal 30 is provided, and a left end of the pressing arm part 31B from the connected area 31A. A partial groove area A′2 corresponding to a substantially horizontal U-shaped part formed by the part where the connecting part 33 and the contact arm part 32D are provided, and the partial groove area A′1 to the partial groove area A′2 It consists of a tapered partial groove area A′3 whose groove width is gradually narrowed toward the front. That is, the partial groove area A′1 is larger in the groove width than the partial groove area A′2 (see FIG. 4).

  As shown in FIG. 4, the partial groove areas A ′ 1 and A ′ 2 are formed with a groove inner width dimension larger than the plate thickness of the second terminal 30. In a state where the second terminal 30 is held in the second holding groove 14, the inner wall surface of the partial groove areas A ′ 1, A ′ 2, A ′ 3 and the plate surface of the first region of the second terminal 30. A gap is formed between them.

  The second terminal 30 includes a portion extending from the left side position of the extending portion 32C to the fixing portion 32E and a portion adjacent to the coupled region 31A in the pressed portion 31C, that is, outside the first region and in the second holding groove. 14 has a second region formed by a portion facing the inner wall surface.

Further, the second holding groove 14 includes a portion extending along the partial groove area A′2 from the left side position of the lower half of the lower half of the lower groove to the groove 14A and the right of the lower groove. A half portion is formed as a second groove region B ′ corresponding to the second region.

  The second groove area B 'is formed with a groove inner width dimension smaller than that of the first groove area A'. In the present embodiment, the in-groove width dimension of the second groove area B ′ is slightly larger than the plate thickness of the second terminal 30, and the inner wall surface of the second groove area B ′ and the plate of the second terminal 30. A slight gap is formed between the surfaces. The second groove region B ′ guides the second region B ′ when the second terminal 30 is press-fitted into the second holding groove 14 with a part of the plate thickness surface of the edge portion, and the second terminal 30 It plays a role of regulating the deviation in the plate thickness direction.

  In the present embodiment, as described above, in the upper arm portion 31, the portion adjacent to the connected region 31A in the pressed portion 31C is formed as the second region. Moreover, in the lower arm part 22, the part from the left side position of the extension part 32C to the fixing | fixed part 32E is formed as a 2nd area | region. That is, in the lower arm portion 32, it can be said that the second region exists in both the left half portion and the right half portion. Accordingly, in the second terminal 30, the plate thickness direction is determined by the second groove region B ′ corresponding to each second region in a total of three second regions including one location in the upper arm portion 31 and two locations in the lower arm portion 32. Deviations in are regulated.

  In the present embodiment, the in-groove width dimension of the second groove area B ′ is slightly larger than the plate thickness dimension of the second terminal 30, but instead, for example, the in-groove width of the second groove area B ′. The size is substantially equal to the plate thickness of the second terminal 30, and the second region of the second terminal 30 is press-fitted so that the plate surface is pressed by the inner surface of the second groove region B ′. It may be.

  The pressure member 40 is made by molding an insulating material such as resin, and is provided so as to extend from the inside of the housing as shown in FIGS. 1 (A) and 1 (B). , Having a width over the arrangement range of the terminals 20 and 30 in the terminal arrangement direction.

  The pressurizing member 40 is provided at a position corresponding to the terminals 20 and 30 in the terminal arrangement direction in about a half portion located in the pressurizing member rotating space 12 of the housing 10. Slit-like grooves 41 and 42 that allow 21C and 31C to pass therethrough are formed. Each groove portion 41, 42 is provided with a cam portion 43 that connects opposite inner wall surfaces (inner wall surfaces facing each other in the terminal arrangement direction) of each groove portion 41, 42 at the end position of the pressure member 40. ing.

  When the pressure member 40 is in the open position, that is, in a posture in which the pressure member 40 extends upward, the cam portion 43 has an oval shape whose cross section is long in the insertion / extraction direction of the flat conductor. None, when the pressure member 40 is in the closed position, that is, in the posture extended to the right in FIGS. 1A and 1B, the cross section thereof forms an oval shape that is long in the connector height direction. .

  The dimensions of the cam portion 43 in the short direction are the distance between the guide recess 22E-1 and the pressed recess 21C-1 in the first terminal 20, and the upper edge of the cam guide portion 32F in the second terminal 30 and the pressure. It is smaller than the distance between the lower edge of the part 31C. Further, the distance between both ends in the longitudinal direction of the cam portion 43 is the distance between the guide recess 22E-1 and the pressure-receiving recess 21C-1, and the upper edge of the cam guide portion 32F and the pressure-receiving portion 31C. It is larger than the distance between the lower edge.

  Next, how to use the connector 1 will be described with reference to FIGS. 2 (A) and 2 (B). First, the connecting portion 22D of the first terminal 20 and the connecting portion 32B of the second terminal 30 of the connector 1 are soldered to corresponding circuit portions formed on the circuit board.

  Then, the flat conductor P is inserted into the receiving portion 11 in a state where the pressure member 40 of the connector 1 is in the open position. The insertion of the flat conductor P is such that the front end of the flat conductor P (the right end in FIGS. 1A and 1B) is between the pressing portion 21B-1 of the first terminal 20 and the contact portion 22C-1. And it passes between the press part 31B-1 and the contact part 32D-1 of the 2nd terminal 30, and contact | abuts to the back wall part 11A of this receiving part 11, and is completed. In a state where the insertion of the flat conductor P is completed, the corresponding circuit portion P2 formed on the lower surface of the flat conductor P is located on the contact portions 22C-1 and 32D-1.

  Next, the pressure member 40 in the open position is rotated and brought to the closed position. At this time, the cam portion 43 rotates toward the closed position while being guided by the guide recess 22E-1 of the cam guide portion 22E of the first terminal 20 and the upper edge portion of the cam guide portion 32F of the second terminal 30. After the start of rotation, the end of the cam portion 43 pushes up the pressed portions 21C and 31C of the upper arm portions 21 and 31 upward. As a result, the connecting portion 23 of the first terminal 20 and the connecting portion 33 of the second terminal 30 are elastically deformed so as to incline to the left. As a result, the upper arm portion 21 and the second terminal 30 of the first terminal 20 are deformed. The upper arm portion 31 is inclined like a lever with the connected regions 21A and 31A as fulcrums, and the left end is displaced downward.

  Accordingly, the pressing portions 21B-1 and 31B-1 formed at the left ends of the upper arm portions 21 and 31 are displaced downward to press the upper surface of the flat conductor P downward. Thus, when the pressing portions 21B-1 and 31B-1 press the flat conductor P, the corresponding circuit portion P2 provided on the lower surface of the flat conductor P becomes the contact portion of the contact arm portions 22C and 32D. 22C-1 and 32D-1 are pressed from above, and the contact arm portions 22C and 32D are elastically deformed downward.

  When the rotation operation is completed when the pressure member 40 reaches the closed position, the cam portion 43 of the pressure member 40 is in the shape of a long ellipse in the vertical direction at the closed position, and the pressure-receiving portion 21C. , 31C is kept pushed up.

  In a state where the pressure member 40 is in the closed position, the state where the pressing portions 21B-1 and 31B-1 of the terminals 20 and 30 press the flat conductor P is maintained, and the corresponding circuit portion of the flat conductor P is maintained. The contact state with the contact pressure between P2 and the contact portions 22C-1 and 32D-1 is maintained. As a result, an electrical connection state between the flat conductor P and the circuit board via the connector 1 is ensured.

  In the present embodiment, in the first terminal 20, a second groove region B is formed corresponding to a second region formed at two locations for the upper arm portion 21 and at one location for the lower arm portion 22. In the second terminal 30, a second groove region B ′ is formed corresponding to a second region formed at one location for the upper arm portion 31 and at two locations for the lower arm portion 32. That is, since the displacement of the terminals 20 and 30 in the plate thickness direction is restricted at three locations distributed over a wide range of the terminals 20 and 30, the positions of the terminals 20 and 30 in the plate thickness direction are stabilized, and the terminals 20 and 30 are easily maintained in the normal positions. As a result, the terminals 20 and 30 are less likely to be shaken or twisted, and a gap having a normal width is secured between the plate surface of the first region and the inner wall surfaces of the first groove regions A and A ′. Therefore, capillary action does not occur in the gap, and flux rise in the first region is well prevented. As a result, the mobility of the upper arm portions 21 and 31 of the terminals 20 and 30 can be ensured. In addition, it is possible to avoid deterioration of the state of the terminal surface due to flux increase.

  Further, in the present embodiment, the first groove areas A and A having a groove inner width dimension larger than the plate thickness of the terminals 20 and 30 corresponding to the first areas formed by the portions where the connection portions 22D and 32B are provided. Since 'is formed, a gap having a normal width is secured between the connection portions 22D and 32B and the first groove areas A and A'. Therefore, even if the connection portions 22D and 32B are solder-connected to the circuit board, the flux does not move up along the connection portions 22D and 32B. As a result, flux rise can be fundamentally prevented.

  In the present embodiment, in the terminals 20 and 30, second regions are formed at positions adjacent to the connected areas 21 </ b> A and 31 </ b> A of the upper arm parts 21 and 31 and the connected areas 22 </ b> A and 32 </ b> A of the lower arm parts 22 and 23. . As described above, the connected areas 21A, 31A, 22A, and 32A are included in the first area, and a second area is formed at a position adjacent to the connected areas 21A, 31A, 22A, and 32A. Therefore, the displacement of the first region in the thickness direction is regulated at a position close to the first region. As a result, the displacement regulation position is closer to the first region, so that the effect of the displacement regulation can be increased, and the terminals 20 and 30 can be more reliably maintained at the normal positions.

  In the present embodiment, the second groove regions are formed corresponding to the second regions formed in a total of three locations in the terminal, but the number of the second regions and the corresponding second groove regions is as follows: You may form in four or more places in total. As the number of places where the terminal deviation is restricted increases, the range for holding the terminal becomes wider, and the position of the terminal in the thickness direction is more reliably brought to the normal position. In order to stabilize the position of the terminal in the plate thickness direction, it is preferable that the second region and the second groove region are formed for both the upper arm portion and the lower arm portion in order to distribute the restricting positions over the entire terminal region. .

  In the present embodiment, the electrical connection between the flat conductor P and the terminals 20 and 30 is made between the corresponding circuit portion P2 provided on the lower surface of the flat conductor P and the contact portions 22C-1 and 32D of the terminals 20 and 30. -1 (hereinafter referred to as “lower contact connection”), the form of connection is not limited to this. For example, a corresponding circuit portion is provided on the upper surface of the flat conductor P, and contact between the corresponding circuit portion and the pressing portions 21B-1 and 31B-1 of the terminals 20 and 30 (hereinafter referred to as “upper contact connection”) is performed. Alternatively, corresponding circuit portions may be provided on the upper and lower surfaces of the flat conductor P, and both upper contact connection and lower contact connection may be used. Further, the upper contact connection and the lower contact connection may be alternately made in the terminal arrangement direction.

  In the present embodiment, the first terminals and the second terminals are alternately arranged, but instead of this, only the first terminal may be provided, or only the second terminal is provided. It may be. When only the first terminal is provided, the housing has a first holding groove corresponding to the first terminal, and when only the second terminal is provided, the housing has the second terminal. A second holding groove is formed correspondingly. As a result, flux rise is reliably prevented in the first holding groove or the second holding groove.

  The connector according to the present embodiment is a so-called back flip type connector in which the terminal has a horizontal H shape and is brought into the open position or the closed position by the rotation of the pressure member. However, the connector type is limited to this. I can't. For example, one end side of the upper arm portion and the lower arm portion is connected by a connecting portion so that the entire terminal has a horizontal U shape, and the terminal is brought into an open position or a closed position by rotation of a pressure member provided on the other end side. It may be a so-called front flip type connector. Further, a so-called non-Zif type in which a flat conductor is inserted with a low insertion force between an upper arm portion and a lower arm portion of a terminal having a horizontal U-shape without a pressing member. It may be a connector.

DESCRIPTION OF SYMBOLS 1 Connector 23 Connection part 10 Housing 30 2nd terminal 13 1st holding groove 31 Upper arm part 14 2nd holding groove 31A Connected area 20 1st terminal 31B-1 Press part 21 Upper arm part 31C Pressurized part 21A Connected area 32 Below Arm portion 21B-1 Pressing portion 32A Connected area 21C Pressurized portion 32B Connection portion 21D Projection portion 31B-1 Pressing portion 22 Lower arm portion 32D Contact arm portion (branching arm)
22A To-be-connected area 32D-1 Contact part 22B To-be-held arm part 32F Cam guide part 22C Contact arm part (branch arm) 33 Connection part 22C-1 Contact part 40 Pressure member 22D Connection part 43 Cam part 22E Cam guide part P Flat conductor

Claims (7)

  A housing made of an electrical insulator; and a terminal press-fitted and connected to a flat conductor by a terminal holding groove formed in a slit shape in the housing, and the terminal maintains a flat surface of the metal plate. An upper arm portion and a lower arm portion that are arranged side by side, and a connecting portion that connects the upper arm portion and the lower arm portion at a connected region of both arm portions, the lower arm portion is One end side that is held by the terminal holding groove and has a connection portion that is solder-connected to the circuit board, and the upper arm portion is a pressing portion that presses the upper surface of the flat conductor downward, and is an insertion side of the flat conductor In the flat conductor electrical connector, the terminal holding groove corresponds to a first region including a portion provided with the connecting portion, a connected region of the upper arm portion, and a connecting portion. A first groove region having a groove inner width larger than the thickness is formed, and the first region of the terminal is outside the first region. And corresponding to a second region formed in at least two places on one of the upper arm part and the lower arm part and at least one place on the other side, the inner width dimension of the groove is smaller than the first groove area. An electrical connector for a flat conductor, characterized in that a second groove region that allows insertion of two regions is formed.   The flat conductor electric connector according to claim 1, wherein the second region is formed at a position adjacent to at least one of the connected region of the upper arm portion and the connected region of the lower arm portion.   The electrical connector for a flat conductor according to claim 1 or 2, wherein the second region is formed as a protrusion protruding from at least one edge of the upper arm and the lower arm.   The pressure member further includes a pressure member that is rotatable between an open position that allows insertion of the flat conductor and a closed position that increases contact pressure at the pressing portion with respect to the flat conductor. 4. A cam portion that is arranged between the lower arm portion and acts on the upper arm portion in a closed position to press the pressing portion against the flat conductor. An electrical connector for a flat conductor according to one.   The upper arm part and the lower arm part are connected to each other in the longitudinally intermediate part by a connecting part, and the upper arm part applies a force from the cam part to the other end side of the connected part of the upper arm part. The lower arm portion has a flexible branch arm that branches upward on one end side from the coupled region of the lower arm portion and extends to the one end side. The arm has a contact portion in contact with the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the other end side with respect to the coupled region of the lower arm portion and the connection portion. The flat conductor electrical connector according to claim 4, further comprising a cam guide portion that guides rotation of the cam portion between the connected region.   The upper arm part and the lower arm part are connected to each other in the longitudinally intermediate part by a connecting part, and the upper arm part applies a force from the cam part to the other end side of the connected part of the upper arm part. The lower arm portion has a flexible branch arm that branches upward on one end side from the coupled region of the lower arm portion and extends to the one end side. The branch arm has a contact portion that comes into contact with the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the one end side, and has the other end than the coupled region of the lower arm portion. The flat connector electric connector according to claim 4, further comprising a cam guide portion that guides rotation of the cam portion on the side.   The terminal is composed of two types of terminals, a first terminal and a second terminal. The first terminal and the second terminal are alternately arranged, and the first terminal has an upper arm portion and a lower arm portion in the middle in the longitudinal direction. Are connected to each other by a connecting portion, and the upper arm portion has a pressure receiving portion that receives a force from the cam portion on the other end side of the upper arm portion to be connected, and the lower arm portion has the It has a flexible branch arm that is branched upward on one end side from the connected region of the lower arm portion and extends to the one end side, and the branch arm contacts the lower surface of the flat conductor on the one end side. A contact portion, and the lower arm portion has a connecting portion on the other end side of the connected region of the lower arm portion, and guides rotation of the cam portion between the connecting portion and the connected region. The second terminal has an upper arm portion and a lower arm portion that are connected to each other by a connecting portion at the intermediate portion in the longitudinal direction, and the upper arm portion is connected to the upper terminal. A pressure-receiving portion that receives the force from the cam portion on the other end side of the connected region of the lower arm portion, and the lower arm portion is branched upward on one end side from the connected region of the lower arm portion. It has a flexible branch arm that extends to one end, the branch arm has a contact portion that contacts the lower surface of the flat conductor on the one end side, and the lower arm portion has a connection portion on the one end side. The flat connector electric connector according to claim 4, further comprising a cam guide portion that guides the rotation of the cam portion on the other end side of the connected region of the lower arm portion.

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